J, V. K., S. P. T., and R. R. “Pre-Operative Ondansetron Vs. Metoclopramide for Prevention of Post-Operative Nausea and Vomiting in Elective Lower-Segment Caesarean Section under Spinal Anaesthesia”. International Journal of Research in Medical Sciences, vol. 2, no. 1, Jan. 2017, pp. 175-9, https://www.msjonline.org/index.php/ijrms/article/view/2096.